IK Multimedia iRig HD 2 Guitar Tuner for iPhone, Mac

Meet the IK Multimedia iRig HD 2: a digital guitar interface that lets you combine your musical instrument with your iOS or Mac device to produce music like a pro. It has a 1/4″ output jack for live performance. There is also a 1/8″ headphone output for silent practice. The device offers full 24-bit, 96 kHz input and output.